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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [AVX512] bitcast assertion hits in SelectionDAG.cpp"
href="https://llvm.org/bugs/show_bug.cgi?id=23363">23363</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[AVX512] bitcast assertion hits in SelectionDAG.cpp
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>matt@pharr.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=14261" name="attach_14261" title="test case">attachment 14261</a> <a href="attachment.cgi?id=14261&action=edit" title="test case">[details]</a></span>
test case
With top of tree and the attached test case, if I run "llc -mcpu=knl
bugpoint-reduced-simplified.ll", I get:
Assertion failed: (VT.getSizeInBits() == Operand.getValueType().getSizeInBits()
&& "Cannot BITCAST between types of different sizes!"), function getNode, file
SelectionDAG.cpp, line 2989.
[....]
Stack dump:
0. Program arguments: llc -mcpu=knl bugpoint-reduced-simplified.ll
1. Running pass 'Function Pass Manager' on module
'bugpoint-reduced-simplified.ll'.
2. Running pass 'X86 DAG->DAG Instruction Selection' on function
'@raytrace_tile___uniuniuniuniuniuniuniuniun_3C_Cunf_5B_4_5D__3E_un_3C_Cunf_5B_4_5D__3E_un_3C_unf_3E_un_3C_uni_3E_un_3C_s_5B__c_unLinearBVHNode_5D__3E_un_3C_s_5B__c_unTriangle_5D__3E_'
[2] 40640 illegal hardware instruction llc -mcpu=knl
bugpoint-reduced-simplified.ll</pre>
</div>
</p>
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